JP2003260096A - Medical treatment bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical treatment bed capable of attaining a calm motion of a moving segment in a direction toward a reduction in the height of an X-shaped linkage, preventing noise, vibration or oscillation at the time of the motion and further preventing patient's anxiety or an uncomfortable feeling. <P>SOLUTION: A hydraulic cylinder for changing a width of an X-shaped linkage supporting assisting beds 18, 19 is provided with a cushion mechanism. It is possible to decrease a moving speed of the assisting beds 18, 19 toward a direction for reducing the height of the X-shaped linkage at the time of completion of the motion. Accordingly, the motion of the assisting beds 18, 19 toward a direction for reducing the height of the X-shaped linkage can be completed under a calm state, preventing striking sound or vibration or oscillation at the time of the motion and further preventing patient's anxiety or the uncomfortable feeling. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical table which is supported by a so-called X-shaped link and has a moving portion which moves in the height direction of the X-shaped link when the height of the X-shaped link changes.

[0002]

2. Description of the Related Art A medical table such as a medical examination table and a delivery table is provided with a moving section, and for example, a delivery table is provided with an auxiliary table. When not in use, this auxiliary table is stored under the seat plate, etc., and is used as a part of a horizontal bed on which a newborn baby immediately after delivery is placed or the patient lies down for umbilical cord treatment, that is, cutting of the umbilical cord. When used, it is pushed out from below the seat plate and raised to an appropriate height.
Then, such pushing and raising of the auxiliary table and lowering and retracting for storage are performed as many times as necessary during delivery.

In order to raise and lower the auxiliary table in this manner, the auxiliary table is supported on the upper ends of the pair of links in the X-shaped link, and the fluid pressure cylinder as the driving section moves the lower end of the one link. Move in the width direction of the X-shaped link.
That is, when the lower end of the other link of the X-shaped link is fixed and the piston rod of the fluid pressure cylinder is moved so that the lower end of one link approaches the lower end of the other link, The width of the X-shaped link becomes narrower and the height becomes higher, and as a result, the auxiliary base rises. On the contrary, if the lower end of one link is moved away from the lower end of the other link, the width of the X-shaped link becomes wider and the height becomes lower, and as a result, the auxiliary stand descends.

[0004]

However, in the conventional medical table, the moving speed of the piston rod in the fluid pressure cylinder, that is, the speed at which the fluid pressure cylinder moves the lower end of one link in the width direction of the X-shaped link, is It was constant from the beginning to the end of the transfer. On the other hand, when the width of the X-shaped link changes, the upper end of each link draws an arcuate movement trajectory relative to the lower end. If the moving speed of the piston rod is constant, the moving speed on the arc is also constant. However, even if the moving speed on the circular arc is constant, as the width of the X-shaped link becomes wider, the component of the moving speed in the width direction of the X-shaped link decreases and the component in the height direction of the X-shaped link decreases. Will increase.

That is, in the conventional medical table, when the movement of the moving portion in the direction of reducing the height of the X-shaped link is completed, the moving portion is suddenly stopped from the state of moving at a high speed. For this reason, impact noise, vibration, rocking, etc. are generated when the movement is completed, causing anxiety and discomfort to the patient. In particular, when the moving portion is lowered in the vertical direction, gravity of the moving portion is applied in addition to the reason described above, and thus the moving speed is particularly high. As a result, especially the descending of the moving part is completed abruptly, and when the descending is completed, particularly large impact noises, vibrations, rocking, etc. are generated, causing particularly great anxiety and discomfort to the patient.

Therefore, according to the invention of the present application, the movement of the moving portion in the direction of reducing the height of the X-shaped link is gently completed, and the generation of impact noise, vibration, rocking, etc. at the completion of the movement is prevented. Therefore, it is an object of the present invention to provide a medical table capable of preventing the patient from feeling anxious or uncomfortable.

[0007]

According to a first aspect of the present invention, in a medical table according to claim 1, a speed for reducing the speed of the movement at the end of the relative movement by one end of one of the links in the direction of widening the width of the X-shaped link. A lowering mechanism is provided on the drive for this movement. Therefore, the moving speed of the moving unit in the direction of reducing the height of the X-shaped link can be reduced at the end of the movement.

In the medical table according to the second aspect, the fluid pressure cylinder serves as a drive portion, and the cushion mechanism of the fluid pressure cylinder serves as a speed reduction mechanism. Since the cushion mechanism of the fluid pressure cylinder can be realized with a simple structure, it is possible to reduce the moving speed of the moving portion in the direction of reducing the height of the X-shaped link at the end of the movement at a slight cost increase. To be done.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention applied to a delivery table will be described below with reference to FIGS. 1 to 3 show the entire delivery table of the present embodiment. In this delivery table 11, an elevator 13 is provided on a base 12, and a seat plate 14 and a back plate 15 are provided on the elevator 13. A pair of grips 16 for the patient to grip are provided on the left and right sides of the seat plate 14, and a pair of pedestal devices 17 for supporting the knees and heels of the patient are provided below the left and right sides of the seat plate 14. Has been. Inside the lifting table 13, two auxiliary tables 18 and 19 are provided.

The elevator 13 is an elevator drive mechanism (not shown).
It is possible to move up and down with respect to the base 12, and the height of the seat plate 14, the back plate 15, and the auxiliary bases 18 and 19 is adjusted by this vertical movement. The seat plate 14 and the back plate 15 are rotatable in the directions of arrows a, a'and arrows b, b'by a seat plate and back plate drive mechanism described below. The 15 angles are adjusted.

4 and 5 show a seat plate and back plate drive mechanism 21. A slide base 22 is fixed in the lift base 13, and a frame 23 is fixed on the slide base 22. A bracket 24 is fixed on the frame 23, and a shaft 25 is supported by the bracket 24. One end of a substantially L-shaped arm 26 is fixed to the rear end of the seat plate 14, and the arm 27 and the bracket 28 are respectively attached to the lower end of a frame which will be described later and is slidable with respect to the back plate 15. One end of is fixed. The central portions of the arms 26 and 27 are rotatably attached to the shaft 25, and one end of a link 31 is rotatably attached to the other end of the bracket 28 by a pin 29.

A single-acting hydraulic cylinder 32 is attached to the frame 23 by a pin 33, and a tip end portion of a piston rod 32a is rotatably attached to the other end portion of the arm 26 by a pin 34. The hydraulic chamber 32 on one side of the piston 32c in the cylinder tube 32b
Pressure oil is supplied to and discharged from the port 32e at d.

Further, the double-acting hydraulic cylinder 35 has a pin 3
6 is attached to the frame 23 by means of 6, and the tip end of the piston rod 35a is connected by a pin 37 to the link 31.
Is rotatably attached to the other end of the. A guide roller 38 is also rotatably attached to the pin 37. A pair of upper and lower guide rails 39 are fixed to the frame 23, and the guide rollers 38 are guided by the guide rails 39 and are movable in the directions of arrows c and c '. Cylinder tube 3
Hydraulic chambers 35d on both sides of the piston 35c in 5b,
Pressure oil is alternately supplied to and discharged from the ports 35e and 35g, respectively.

In such a seat plate and back plate drive mechanism 21,
As shown in FIG. 5, the hydraulic chamber 3 of the hydraulic cylinder 32 is
When pressure oil is supplied into 2d from port 32e, piston rod 32a is pushed out in the direction of arrow c via piston 32c. As a result, the arm 26 and the seat plate 14 rotate around the shaft 25 in the arrow a direction. On the contrary, as shown in FIG. 4, when the pressure oil in the hydraulic chamber 32d of the hydraulic cylinder 32 is discharged from the port 32e, the arm 26 and the seat plate 14 cause the shaft 25 to move by the gravity of the patient and the seat plate 14. Rotates in the direction of the arrow a '. As a result, the piston rod 32a is pushed back in the direction of arrow c '.

On the other hand, as shown in FIG. 4, one port 35f is provided in one hydraulic chamber 35d of the hydraulic cylinder 35.
When pressure oil is supplied from the piston rod 35a, the piston rod 35a is pushed out in the arrow c'direction via the piston 35c. As a result, the arm 27 and the back plate 15 rotate around the shaft 25 in the arrow b direction via the link 31 and the bracket 28. On the contrary, as shown in FIG.
When pressure oil is supplied to the other hydraulic chamber 35e from the other port 35g, the piston rod 35a is pulled in the direction of arrow c via the piston 35c. As a result, the arm 27 and the back plate 15 rotate around the shaft 25 in the arrow b'direction.

The arrow a, a'direction and the arrow b, as described above,
The rotation of the seat plate 14 and the back plate 15 in the b'direction adjusts the angle of the posture of the patient. Back plate 1 in the direction of arrow b '
When the back plate 15 is brought into a horizontal state of being flush with the seat plate 14 by continuing the rotation of 5, the tip portion 27a of the arm 27 contacts the lower surface 14a of the seat plate 14 in the direction of the arrow b '. If the rotation of the back plate 15 in the direction of the arrow b ′ is further continued from this state,
The seat plate 14 is also pressed by the arm 27 from below and rotates integrally with the back plate 15 in the direction of arrow a.

When the seat plate 14 rotates in the direction of the arrow a after the tip portion 27a of the arm 27 contacts the lower surface 14a of the seat plate 14, the arm 26 causes the piston rod 32a and the piston 32c of the hydraulic cylinder 32 to move in the arrow direction. Since it is only pulled out in the c direction, the rotation of the seat plate 14 in the arrow a direction integrated with the back plate 15 is not hindered by the hydraulic cylinder 32. Further, at this time, the seat plate 14 and the back plate 15 are not
Since they rotate integrally with each other in the direction of the arrow a and the direction of the arrow b ′ in the state of being flush with each other, the back plate 15 does not unexpectedly rotate to a depression angle exceeding the elevation angle of the seat plate 14.

Therefore, the patient continuously and smoothly shifts from the sitting position shown in FIGS. 1 and 4 to the supine position in the depression state shown in FIGS. An emergency situation such as when an anemia occurs can be easily dealt with. In the description of FIGS. 4 and 5, the seat plate 14 and the back plate 15 are integrally rotated by the arms 27 of the back plate 15 so as to be flush with each other in the arrow a direction and the arrow b ′ direction. When the back plate 15 comes into contact with the arm 26 of the seat plate 14 when the seat plate 15 is flush with the seat plate 14, the arm plate 26 causes the seat plate 14 and the back plate 15 to be integrated in a state of being flush with each other. It may be configured to rotate in the arrow a direction and the arrow b'direction.

As shown in FIGS. 1 and 2, the auxiliary table 1
8 and 19 can be moved in the directions of arrows c and c ′ between the inside of the lift table 13 and the outside of the lift table 13 by a slide base drive mechanism and an auxiliary base drive mechanism described below. It is possible to move in the directions of arrows d and d ′ outside the elevating table 13, and by these movements, the pushing amounts and heights of the auxiliary tables 18 and 19 with respect to the seat plate 14 are adjusted.

FIG. 6 shows the slide base drive mechanism 41. A hydraulic cylinder 43 is mounted by a plurality of brackets 42 on the slide base 22 fixed inside the lift 13. A holder 44 is attached to the tip of the piston rod 43a of the hydraulic cylinder 43,
A pinion 46 is rotatably attached to the holder 44 by a pinion shaft 45. A fixed rack 47 is mounted on the sliding base 22 and a sliding rack 49 is mounted on the sliding base 51 by a plurality of brackets 48. The pinion 46 meshes with a fixed rack 47 and a sliding rack 49.

In such a slide base drive mechanism 41, when the piston rod 43a of the hydraulic cylinder 43 is pushed out in the direction of arrow c, the pinion 46 moves in the direction of arrow e while moving on the fixed rack 47 in the direction of arrow c. To do. Then, by the rotation of the pinion 46, the sliding rack 49 and the sliding base 51 integrated with the sliding rack 49 also move in the arrow c direction. On the contrary, when the piston rod 43a is pulled in the direction of arrow c ', the sliding rack 49 and the slide base 51 also move in the direction of arrow c'.

Since the sliding rack 49 and the sliding base 51 move further relative to the moving pinion 46, the moving distance of the piston rod 43a is twice as fast as the moving speed of the piston rod 43a. Move twice the distance. Further, as will be described later, the auxiliary bases 18 and 19 are the sliding bases 5.
It is connected to 1. Therefore, the movement of the piston rod 43a in the directions of the arrows c and c ′ causes the auxiliary bases 18 and 1 to move.
9 pushes the seat 9 forward of the seat plate 14 and the auxiliary base 18,
The operation of pulling 19 downward below the seat plate 14 or the like is quickly performed. Moreover, the length of the hydraulic cylinder 43 may be half the moving distance of the slide base 51.

7 to 9 show an auxiliary base drive mechanism 52. A plurality of guide wheels 53 are rotatably attached to the slide base 22, and a pair of guide shafts 5 are attached to the slide base 51.
4 is mounted horizontally, the guide wheel 53 and the guide shaft 5
4 and 4 are engaged with each other. The slide base 51 is provided with two pantograph mechanisms 55a and 55b arranged in the directions of arrows c and c ', which are the sliding directions.

The pantograph mechanism 55a includes a link 56.
The central portions of a and 57a are formed of a pair of X-shaped links that are rotatably connected to each other in an X-shape by pins 58a. The pantograph mechanism 55b also has a link 56.
Each of the central portions of b and 57b is composed of a pair of X-shaped links rotatably connected to each other in an X-shape by a pin 58b. The upper ends of the links 56a and 56b are rotatably attached to the protrusions 61a and 61b on the lower surfaces of the auxiliary bases 18 and 19 by the pins 59a and 59b. The lower end of each of the links 57a and 57b has a pin 6
It is rotatably attached to the slide base 51 by 2a and 62b.

At the lower ends of the links 56a, 56b, guide rollers 64a, 6 are provided by roller shafts 63a, 63b.
4b is rotatably attached to the link 57a,
Guide rollers 65a and 65b are rotatably attached to the respective upper ends of the 57b. A pair of roller shafts 63
Frames 66a and 66b are attached between a and 63b, and another pair of roller shafts 67a and 67b different from the roller shafts 63a and 63b are attached to the frames 66a and 66b, and the guide rollers 68a and 68b are rollers. Axis 6
It is rotatably attached to 7a and 67b.

A pair of guide rails 69a and 69b extending in the directions of arrows c and c'are fixed to the slide base 51. The guide rollers 64a, 64b, 68a and 68b and the frames 66a and 66b are guided rails 69a and 69b. It is possible to move in the directions of arrows c and c'by being guided by. Auxiliary stand 18, 1
A guide rail 71 extending in the directions of arrows c and c'on the lower surface of 9
a, 71b are fixed, and guide rollers 65a, 65
b is also guided by guide rails 71a and 71b, and arrow c,
It can move in the c'direction. A bracket 72 is fixed to the slide base 51, and a bracket 73 is also fixed to the frame 66a of the pantograph mechanism 55a.

The base of a double-acting hydraulic cylinder 74 is fixed to the bracket 72, and the tip of the piston rod 74a of the hydraulic cylinder 74 is fixed to the bracket 73 by the pin 7.
They are connected by 5. A shaft 76 is attached to the frame 66b of the pantograph mechanism 55b, and an arm 77 as a rotating means is attached to the shaft 76 so as to be rotatable in the directions of arrows f and f '.

A roller 78 as a contact means is rotatably attached to a side surface of an intermediate portion of the arm 77, and a groove-shaped engaging portion 77a is provided at a tip portion of the arm 77. A pin 79 is provided on the frame 66a of the pantograph mechanism 55a, and the engaging portion 77a can be engaged with and disengaged from the pin 79 in the directions of arrows f and f '. The slide base 22 has a chevron-shaped cam-shaped projection 81 as a separating means.
Is fixed.

10 to 12 show the hydraulic cylinder 74 in detail. Cylinder tube 7 of hydraulic cylinder 74
A piston 74c is housed in 4b, and a head cover 74d and a rod cover 74e are attached to one end and the other end of the cylinder tube 74b, respectively.
Hydraulic pressure chambers 74f and 74g are formed between the piston 74c and the head cover 74d and the rod cover 74e, respectively, and the needle 74h and the above-mentioned piston rod 74a are attached to the head cover 74d side and the rod cover 74e side of the piston 74c, respectively. ing.

A piston 74c is provided in the head cover 74d.
The needle 74 even when the head is in contact with the head cover 74d.
A guide portion 74i, which is a space into which h can be inserted, is provided, and the piston rod 74a is also provided in the rod cover 74e.
A guide portion 74j, which is a space into which is inserted, is provided. A connector 74k and an elbow 74l are connected to the head cover 74d and the rod cover 74e, respectively, and these connector 74k and elbow 74l serve as ports for supplying and discharging pressure oil.

A connector 74m is connected to the tip of the piston rod 74a, and a through hole 74n into which the pin 75 is inserted is provided in the connector 74m. The shape of the needle 74h may be a stepped columnar shape as shown in FIG. 11 in addition to the cylindrical shape at the portion other than the tip as shown in FIG. In addition, the guide section 74
The shape of i is not only cylindrical as shown in FIG.
It may be a stepped columnar shape as shown in FIG.

FIG. 13 shows a hydraulic cylinder drive mechanism 82 for driving the hydraulic cylinder 74. The pressure oil tank 82a is provided with a solenoid valve 82 via an oil feed pump 82b.
The solenoid valves 82c and 82d are connected to the connector 74k and the elbow 74l via the check valves 82e and 82f, respectively. The portion between the connector 74k and the check valve 82e is connected to the tank 8 via the solenoid valve 82g.
2a, and the portion between the elbow 74l and the check valve 82f is connected to the tank 82a via the electromagnetic valve 82h.

In order to supply pressure oil from the tank 82a to the hydraulic chamber 74f by the hydraulic cylinder drive mechanism 82,
The solenoid valves 82c, 82h are opened, and the solenoid valves 82d,
Block 82 g. On the contrary, from the tank 82a to the hydraulic chamber 74
In order to supply pressure oil to g, solenoid valves 82d, 82g
And the solenoid valves 82c and 82h are closed.

14 to 17 show the operation of the auxiliary table drive mechanism 52 as described above. Of these, FIG. 14 shows a state in which the auxiliary bases 18 and 19 are stored below the seat plate 14 and the like. In this storage, the piston rod 74a of the hydraulic cylinder 74 shown in FIGS. 7 to 9 is pulled in the direction of the arrow c ', so that the frames 66a and 66b connected to each other by the arm 77 are slid together.
1 simultaneously moves in the direction of the arrow c ', and the roller shaft 63a,
The lower ends of the links 56a and 56b attached to the 63b also slide along with the movement of the frames 66a and 66b.
1 moves in the direction of arrow c '.

However, the lower ends of the links 57a and 57b are fixed to the slide base 51. Therefore, the pantograph mechanisms 55a and 55b are folded in the direction of arrow d '. In this state, the slide base 51 is pulled in the direction of arrow c ′ by the slide base drive mechanism 41 described above, so that the auxiliary base 1
8 and 19 are stored below the seat plate 14 and the like. In addition,
When the delivery table 11 is not used, the auxiliary tables 18 and 19 are thus provided.
Is stored below the seat plate 14 and the like, and the back plate 15 is tilted horizontally by the seat plate and back plate drive mechanism 21 described above.
As shown in FIG. 2, the delivery table 11 becomes compact as a whole.

FIG. 15 shows the pantograph mechanism 55 as described above.
The state of the hydraulic cylinder 74 when a and 55b are folded in the arrow d'direction is shown. Even if the piston rod 74a is pulled in the direction of the arrow c ', if the needle 74h is not yet close to the guide portion 74i as shown in FIG. 15A, the needle 74h and the guide portion 74i are attached to the hydraulic cylinder 74. Has almost no effect.

However, when the needle 74h approaches the guide portion 74i, and particularly when the needle 74h is inserted into the guide portion 74i as shown in FIG. 15 (b), the flow passage of the pressure oil is interrupted. The area is reduced, the head cover 74d acts as a throttle valve, and the piston rod 74a becomes difficult to move in the arrow c'direction. Therefore, at the end of the descent of the auxiliary tables 18 and 19, the descending speed of the auxiliary tables 18 and 19 decreases, and the descent of the auxiliary tables 18 and 19 is gently completed. That is, the needle 74h and the guide portion 74 of the hydraulic cylinder 74.
i is a cushion mechanism.

In FIG. 16, only one auxiliary base 18 is the seat plate 1
4 is being pushed forward. At the time of this extrusion, the slide base 5 is driven by the slide base drive mechanism 41.
1 is slid in the direction of the arrow c from below the seat plate 14 or the like by about a half stroke thereof, and one auxiliary base 18 is pushed forward of the seat plate 14 as shown by the alternate long and short dash line. The slide base 51 is stopped at a position where the auxiliary base 19 is pushed out only below the seat plate 14.

At this time, as shown in FIG. 8, the roller 78 attached to the arm 77 causes the cam-shaped projection 81 to move.
The arm 77 rotates around the shaft 76 in the direction of arrow f, and the locking portion 77a of the arm 77 disengages from the pin 79 in the direction of arrow f. Therefore, the connection between the frame 66a and the frame 66b is released. In this state, the piston rod 74a of the hydraulic cylinder 74 is pushed out in the direction of arrow c.

As a result, only the frame 66a is moved in the direction of arrow c, only the pantograph mechanism 55a is extended in the direction of arrow d, and as shown by the solid line, only one auxiliary base 18 is moved in the direction of arrow d. Pushed up. Therefore,
By controlling the position of the piston rod 74a in the directions of arrows c and c ', the pantograph mechanism 55a is moved to the direction of arrow d,
By expanding and contracting in the d'direction, the height of the auxiliary base 18 with respect to the seat plate 14 can be adjusted in the arrow d, d'directions. Figure 1
In order to store the auxiliary base 18 below the seat plate 14 from the state of No. 6, the operation reverse to the operation described above with reference to FIG. 16 is performed.

By the way, since the length of the umbilical cord of a newborn baby varies depending on the newborn baby, when the newborn baby immediately after delivery is placed on the auxiliary stand 18 and umbilical cord treatment is performed, the height of the auxiliary stand 18 is adjusted. Needs to be done. Therefore, at this time, the height of the auxiliary table 18 is adjusted in the directions of the arrows d and d'as described above, so that umbilical cord treatment, delivery assistance and the like can be performed safely and smoothly.

FIG. 17 shows a state in which both the auxiliary bases 18 and 19 are pushed forward of the seat plate 14. At the time of this extrusion, the slide base drive mechanism 41 slides the slide base 51 from below the seat plate 14 or the like in the direction of arrow c until the end of the entire stroke. Even during this sliding
Frame 66a and frame 66b as shown in FIG.
The connection with is once released. However, in the case of FIG. 17, the sliding of the slide base 51 in the direction of arrow c is continued without being stopped in this state.

Therefore, the roller 78 gets over the cam-shaped projection 81 in the direction of arrow c, and the arm 77 rotates in the direction of arrow f'due to the gravity of the arm 77 and the roller 78 as shown in FIG. Then, in the state where the slide base 51 is slid in the direction of arrow c until the end of the entire stroke,
As shown in FIG. 6, the locking portion 77a of the arm 77 is locked again with the pin 79, and the frame 66a and the frame 6 are locked.
6b maintains the connected state by the arm 77. In this state, the piston rod 74a of the hydraulic cylinder 74 is pushed out in the direction of arrow c.

As a result, both frames 66a and 66b are simultaneously moved in the direction of arrow c, both pantograph mechanisms 55a and 55b are extended in the direction of arrow d, and both auxiliary bases 18 and 19 are moved in the direction of arrow d. It is pushed up at the same time. Therefore, as shown by the solid line, the auxiliary stands 18, 1
9 can be arranged in series in front of the seat plate 14 at a height substantially flush with the seat plate 14. From the state of FIG. 17 to the auxiliary stand 1
In order to store 8 and 19 under the seat plate 14 or the like, as shown in FIG.
The reverse of the above described operation for 7 is performed. Figure 1
7, the sliding table 51 is in a cantilever state and vibrations and the like are likely to occur, but the vibrations and the like are effectively prevented by the cushion mechanism described above.

As described above, the auxiliary bases 18 and 19 are arranged in series in front of the seat plate 14 at a height substantially flush with the seat plate 14, and the back plate is driven by the seat plate and back plate drive mechanism 21 described above. 15
If you lay it down horizontally, you will see the delivery table 11 as shown in FIG.
Is a horizontal bed for supine delivery and for resting the patient in bed. The angle adjustment of the seat plate 14 and the back plate 15 by the seat plate and the back plate drive mechanism 21 and the push-out amount and height of the auxiliary bases 18, 19 by the slide base drive mechanism 41 and the auxiliary base drive mechanism 52 are adjusted. In addition, all storage is performed by a foot switch (not shown).

18 and 19 show the back plate sliding mechanism 83 and its operation. The back plate sliding mechanism 83 has a lower end 84.
The frame 84 is provided with the arm 27 and the bracket 28 having one end fixed thereto, and the frame 84 has a pair of columns 84b. Post 84
A guide rail 85 is provided on one surface of the b
A synthetic resin slip sheet 86 is fixed to the two surfaces of 4b by adhesion or the like. A recess 15a is provided on the back surface of the back plate 15.
Is provided, and the frame 87 is fixed in the recess 15a.

The frame 87 has a pair of guide rails 88.
And a pair of substantially L-shaped frames 89 are fixed. The frame 84 is fitted in the recess 15a, and the guide rail 85 of the support column 84b is provided with the roller bearing 91.
And the slidable sheet 86 of the support column 84b faces the frame 89. For this reason, the back plate 15 is provided with the roller bearing 91 and the slippery sheet 86 so that the arrows g, g ′ with respect to the frame 84.
Can slide very smoothly in the direction.

As described above, by rotating the frame 84 in the directions of arrows b and b'by the hydraulic cylinder 35, the angle of the back plate 15 in the directions of arrows b and b'is adjusted together with the frame 84. At that time, since the back plate 15 is always urged in the direction of the arrow g'by its gravity, the corner portion 15b at the lower end of the front surface of the back plate 15 is always in contact with the corner portion 14b at the rear end of the upper surface of the seat plate 14. The angle of the back plate 15 in the directions of the arrows b and b ′ is adjusted in the state of being kept.

That is, the back plate 15 is rotated in the direction of the arrow b so that the lower end portion 84a of the frame 84 becomes the corner portion 1 of the seat plate 14.
When approaching 4b, the back plate 15 slides in the direction of arrow g with respect to the frame 84. On the contrary, the back plate 15 is rotated in the direction of the arrow b ', so that the lower end portion 84a of the frame 84 is fixed to the seat plate 14.
When separated from the corner portion 14b of the
Sliding in the direction of arrow g '.

For this reason, the corners 15b of the back plate 15 are seated in the seat plate 1
While always in contact with the corner 14b of the arrow 4, the arrows b, b '
The angle of the back plate 15 in the direction is adjusted. Therefore, when the back plate 15 is raised to the arrow b, the corner portion 15b of the back plate 15 approaches the corner portion 14b of the seat plate 14 in the direction of the arrow c,
There is no possibility of pinching the patient's buttocks by these corners 15b and 14b and pushing the patient's buttocks in the direction of arrow c by the corners 15b of the back plate 15.

In the above embodiment, the link 56 is used.
The upper ends of a and 56b and the lower ends of the links 57a and 57b are fixed, and the upper ends of the links 57a and 57b and the links 56a and 56b are fixed to these upper ends and lower ends.
The height of the X-shaped link fluctuates due to the movement of the lower end of the X-shaped link. However, the link 5 is attached to the upper ends of the links 56a and 56b and the lower ends of the links 57a and 57b.
If the upper ends of the links 7a and 57b and the lower ends of the links 56a and 56b relatively move, and as a result, the width and height of the X-shaped link fluctuate, the upper ends of the links 56a and 56b and the link 57a, The lower end of 57b may also be movable.

Further, in the above embodiment, since the needle 74h of the hydraulic cylinder 74 and the guide portion 74i of the head cover 74d serve as a cushion mechanism, the cushion mechanism operates only when the auxiliary bases 18 and 19 are lowered. However, a cushion ring that can be inserted into the guide portion 74j of the rod cover 74e may be attached to the rod cover 74e side of the piston 74c, and in that case, the cushion mechanism operates even when the auxiliary bases 18 and 19 are raised.

In the above embodiment, the cushion mechanism is provided only in the hydraulic cylinder 74 of the auxiliary base drive mechanism 52, but the single-acting hydraulic cylinder 32 and the double-acting type in the seat plate and back plate drive mechanism 21 are provided. The cushion mechanism may be provided in the hydraulic cylinder 35, the hydraulic cylinder 43 in the slide base drive mechanism 41, the hydraulic cylinder for moving up and down the elevator 13, and the like.

Also, these hydraulic cylinders 32, 35,
Instead of 43, 74, another fluid pressure cylinder such as an air cylinder may be used, and the fluid pressure cylinder may be provided with a cushion mechanism. Further, instead of the fluid pressure cylinder, another drive unit provided with a speed reducing mechanism that reduces the speed of the movement at the end of the movement may be provided. Furthermore, although the invention of the present application is applied to the delivery table 11 in the above embodiment, the invention of the present application can also be applied to other medical tables such as a medical examination table.

[0055]

In the medical table according to the first aspect, the moving speed of the moving portion in the direction of reducing the height of the X-shaped link can be reduced at the end of the movement. Therefore, the movement of the moving portion in the direction of reducing the height of the X-shaped link is gently completed, and the generation of impact noise, vibration, rocking, etc. at the time of the completion of the movement is prevented, and the patient feels uneasy. It is possible to prevent discomfort or the like.

In the medical table according to the second aspect, it is possible to reduce the moving speed of the moving unit in the direction of reducing the height of the X-shaped link at the end of the moving at a small increment of cost. Therefore, the movement of the moving portion in the direction of reducing the height of the X-shaped link is gently completed, and the generation of impact noise, vibration, rocking, etc. at the time of the completion of the movement is prevented, and the patient feels uneasy. It is possible to prevent discomfort and the like at a small increment of cost.

[Brief description of drawings]

FIG. 1 is a side view showing a delivery table as a whole according to an embodiment of the invention of the present application, during delivery in a sitting position.

FIG. 2 is a side view corresponding to FIG. 1 during supine delivery.

FIG. 3 is a side view corresponding to FIG. 1 during supine delivery in a depression state.

FIG. 4 is a side view showing a seat plate and a back plate drive mechanism in a delivery table as one embodiment of the invention of the present application, at the time of delivery in a sitting position.

FIG. 5 is a side view corresponding to FIG. 4 at the time of supine delivery in a depression state.

FIG. 6 is a side view of a slide table drive mechanism in the delivery table as one embodiment of the present invention.

FIG. 7 is a plan view of an auxiliary table drive mechanism in the delivery table as one embodiment of the present invention.

FIG. 8A of FIG. 7 in a state where one auxiliary table is raised
It is a side view in the position which follows a-A line.

FIG. 9A in FIG. 7 in a state where two auxiliary bases are raised
It is a side view in the position which follows a-A line.

10 is a partial cross-sectional side view of a hydraulic cylinder in the auxiliary base drive mechanism of FIG.

11 is a cross-sectional view of a main part showing a modified form of a needle in the hydraulic cylinder of FIG.

12 is a cross-sectional view of a main part showing a modified form of the guide part of the needle in the hydraulic cylinder of FIG.

13 is a piping diagram showing a drive mechanism of the hydraulic cylinder of FIG.

FIG. 14 is a side view of the delivery table as an embodiment of the invention of the present application in a state where the auxiliary table is stored.

FIG. 15 is a cross-sectional view of a main part sequentially showing an operating state of the hydraulic cylinder of FIG.

FIG. 16: FIG. 1 in a state in which one auxiliary table is pulled out
It is a side view corresponding to FIG.

FIG. 17 is a view showing a state where two auxiliary bases are pulled out.
It is a side view corresponding to FIG.

FIG. 18 is a side view in which a part of the back plate sliding mechanism in the delivery table as one embodiment of the present invention is cut away.

19 is a cross-sectional view taken along the line BB in FIG.

[Explanation of symbols]

11 ... Delivery table (medical table), 18, 19 ... Auxiliary table (moving part), 74 ... Hydraulic cylinder (fluid pressure cylinder, drive part), 56a, 56b, 57a, 57b ... Link

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuo Matsubara             Atom, 3-18-15 Hongo, Bunkyo-ku, Tokyo             Medical Co., Ltd. F term (reference) 4C341 MM02 MM13 MN16 MP02 MQ07                       MQ08 MR03 MR17 MR20

Claims (2)

[Claims] 1. A pair of links are rotatably connected to each other in an X-shape to form an X-shaped link, and one end of one of the links facing each other in the width direction of the X-shaped link is the other. Is relatively movable in the width direction with respect to one end of the link, and the height of the X-shaped link is changed by this movement, and is supported by the other end of each of the pair of links. In the medical table in which the moving unit moves in the height direction of the X-shaped link due to the fluctuation, a speed reducing mechanism that reduces the speed of this movement at the end of the relative movement in the direction of widening the width A medical table, which is provided in a driving unit for the. 2. The medical table according to claim 1, wherein a fluid pressure cylinder serves as the drive unit, and a cushion mechanism of the fluid pressure cylinder serves as the speed reduction mechanism.